Kantar Operations Software Engineer Interview Questions and Answers

Java Multiple choice questions and 2 coding questions

Q1. Collection in java works
Ans. 
Collection in Java is a framework that provides interfaces and classes to store and manipulate groups of objects.
• Collections can be used to store objects of any type.

• Some common collection types include ArrayList, LinkedList, HashSet, and TreeMap.

• Collections can be sorted, searched, and filtered using various methods.

• Iterators can be used to traverse through collections and perform operations on each element.

• Collection...read more
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Q2. Multithreading environment
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Q3. 2 coding questions and reduce its complexity
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Q1. Spring and cloud platform difference
Ans. 
Spring is a framework for building Java applications, while cloud platform provides infrastructure for deploying and scaling applications.
• Spring provides a set of tools and frameworks for building Java applications, while cloud platform provides infrastructure for deploying and scaling those applications.

• Spring can be used with any cloud platform, while cloud platform can support applications built with any framework.

• S...read more
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Q1. Singleton in java code. multithreading, spring boot questions.
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Q2. SQL queries for finding highest salary
Ans. 
SQL queries to find highest salary
• Use the MAX() function to find the highest salary

• Combine with the SELECT statement to retrieve the corresponding employee details

• Use the ORDER BY clause to sort the results in descending order

• Use the LIMIT clause to limit the number of results returned
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It was an aptitude test

Q1. It was technical test
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Q2. Sort an array with numbers
Ans. 
Use a sorting algorithm like quicksort or mergesort to rearrange the numbers in ascending or descending order.
• Implement a sorting algorithm like quicksort, mergesort, or bubblesort to rearrange the numbers in the array.

• Ensure the algorithm is efficient and handles edge cases like empty arrays or arrays with duplicate numbers.

• Test the sorting function with different arrays to verify its correctness.

• Example: [5, 2, 9, 1,
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Q1. Explain your day to day activities related to spark application
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My day to day activities related to Spark application involve writing and optimizing Spark jobs, troubleshooting issues, and collaborating with team members.
• Writing and optimizing Spark jobs to process large volumes of data efficiently

• Troubleshooting issues related to Spark application performance or errors

• Collaborating with team members to design and implement new features or improvements

• Monitoring Spark application p
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Q2. How would you optimize the performance of Data Pipelines
Ans. 
Optimizing data pipelines involves tuning hardware, optimizing algorithms, and parallelizing processing.
• Use efficient data structures and algorithms to process data quickly

• Parallelize processing to take advantage of multiple cores or nodes

• Optimize hardware resources such as memory and storage for faster data retrieval

• Use caching mechanisms to reduce redundant data processing

• Monitor and analyze pipeline performance to i
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3 coding questions and manager round

Q1. Oops and .net core
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Q1. Coding concepts , data structures
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Q1. System design related queries , past work experience related discussion
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Coder pad , hacker rank, leet code medium

Q1. What is concurrency what is inheritance
Ans. 
Concurrency is the ability of multiple tasks to run simultaneously, while inheritance is a mechanism in object-oriented programming where a class inherits properties and behaviors from another class.
• Concurrency allows multiple tasks to be executed at the same time, improving performance and efficiency.

• Inheritance allows a new class to inherit properties and behaviors from an existing class, promoting code reusability.

• C...read more
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